Luke 15:7

Clement of Alexandria Stromata Book II

For "great is the joy before the Father when one sinner is saved,"[160]

Tertullian On Repentance

The heavens, and the angels who are there, are glad at a man's repentance.[78]

Cyprian Epistle XLVI

For if, in this place, the whole number of the brethren rejoiced at your letter which you sent concerning their confession, and received this tidings of common rejoicing with the greatest alacrity, what must have been the joy there when the matter itself, and the general gladness, was carried on tinder the eyes of all? For since the Lord in His Gospel says that there is the highest "joy in heaven over one sinner that repenteth,"[4]

Cyprian Epistle LI

And in the Gospel He says, "I say unto you, that likewise joy shall be in heaven over one sinner that repenteth, more than over ninety and nine just persons that need no repentance."[41]

Constitutions of the Holy Apostles Book II

In the first place, therefore, condemn the guilty person with authority; afterwards try to bring him home with mercy and compassion, and readiness to receive him, promising him salvation if he will change his course of life, and become a penitent; and when he does repent, and has submitted to his chastisement, receive him: remembering that our Lord has said, "There is joy in heaven over one sinner that repenteth."[69]

Constitutions of the Holy Apostles Book VIII

Let us still pray for them more earnestly, for there is joy in heaven over one sinner that repenteth,[69]

The Ecclesiastical Canons of the Holy Apostles

If any bishop or presbyter does not receive him that returns from his sin, but rejects him, let him be deprived; because he grieves Christ, who says, "There is joy in heaven over one sinner that repenteth."[27]